Ambulance staff take a man from outside a mosque in central Christchurch, New Zealand, Friday, March 15, 2019. A witness says many people have been killed in a mass shooting at a mosque in the New Zealand city of Christchurch. Photo: Mark Baker/AP

Ambulance staff take a man from outside a mosque in central Christchurch, New Zealand, Friday, March 15, 2019. A witness says many people have been killed in a mass shooting at a mosque in the New Zealand city of Christchurch. Photo: Mark Baker/AP

Police and ambulance staff help a wounded man from outside a mosque in central Christchurch, New Zealand, Friday, March 15, 2019. A witness says many people have been killed in a mass shooting at a mosque. Photo: Mark Baker/AP

Armed police patrol outside a mosque in central Christchurch, New Zealand, Friday, March 15, 2019. A witness says many people have been killed in a mass shooting at a mosque in the New Zealand city of Christchurch. Photo: Mark Baker/AP

Ambulance staff take a man from outside a mosque in central Christchurch, New Zealand, Friday, March 15, 2019. A witness says many people have been killed in a mass shooting at a mosque in the New Zealand city of Christchurch. Photo: Mark Baker/AP